TM 9-2330-392-14&PB-3.EXPLANATION OF COLUMNS IN THE MAC, SECTION II.(a) Column(1),GroupNumber. Column 1 lists functional group code numbers, the purpose of which is to identifymaintenance significant components, assemblies, subassemblies, and modules with the next higher assembly.End item group number shall be 00.(b) Column(2),Component/Assembly. Column 2 contains the names of components, assemblies, subassemblies,and modules for which maintenance is authorized.(c) Column(3),MaintenanceFunction Column 3 lists the functions to be performed on the item listed in Column 2.See paragraph B-2 for detailed explanation of these functions.(d) Column(4),MaintenanceLevel. Column 4 specifies, by the listing of a work time figure in the appropriate sub-column(s), the level of maintenance authorized to perform the function listed in Column 3. This figure representsthe active time required to perform that maintenance function at the indicated level of maintenance. If the numberor complexity of the tasks within the listed maintenance function varies at different maintenance levels, appropriatework time figures will be shown for each level The work time figure represents the average time required to restorean item (assembly, subassembly, component, module, end item, or system) to a serviceable condition undertypical field operating conditions. This time includes preparation time (including any necessarydisassembly/assembly time), troubleshooting/fault location time, and quality assurance/quality control time inaddition to the time required to perform the specific tasks identified for the maintenance functions authorized m theMAC The symbol designations for the various maintenance levels are as follows:C....................................Operator or CrewO....................................Unit MaintenanceF ....................................Direct Support MaintenanceH....................................General Support MaintenanceD....................................Depot Support Maintenance(e) Column(5),ToolsandEquipment. Column 5 specifies, by code, those common tool sets (not individual tools) andspecial tools; Test, Measurement and Diagnostic Equipment (TMDE); and support equipment required to performthe designated function.(f) Column(6),Remarks. This column shall, when applicable, contain a letter code, in alphabetic order, which shallbe keyed to the remarks contained in Section IV.B-4.EXPLANATION OF COLUMNS IN TOOL AND TEST EQUIPMENT REQUIREMENTS, SECTION III.(a) Column (1), Reference Code The tool and test equipment reference code correlates with a code used in the MAC,Section II, Column 5.(b) Column (2), Maintenance Level. The lowest level of maintenance authorized to use the tool or test equipment.(c) Column (3), Nomenclature. Name or identification of the tool or test equipment.(d) Column (4), National Stock Number. The National Stock Number of the tool or test equipment.(e) Column (5), Tool Number. The manufacturer's part number.B-2